Wrench.



F. w. STEWART.

' wmzucn.

(Application flied Get. 1, 1898.)

No. 630,42l. Patented Aug. 8, I899.

(No Model.)

WW jxo/Jl A I I I I I I UNITED STATES 5 PATENT OFFICE.

FREDERICK V. STEWART, OF COLDl VATER, MICHIGAN.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 630,421, dated August 8, 1899.

Application filed October 1,1898. Serial No. 692,364. (No model.)

To all whom it may concern: 1

Be it known that I, FREDERICK W. STEW- ART, a citizen of the United States, residing at Goldwater, in the county of Branch and State of Michigan, have invented a new and useful Wrench, of which the following is a specification.

The invention relates to improvements in wrenches.

The object of the present invention is to improve the construction of wrenches and to provide a simple and comparatively inexpensive nut-wrenchin which the movable jaw may be readily placed contiguous to the nut or other object to be clamped and quickly adjusted to exert the desiredpressure on such object.

The invention consists in the construction and novel combination and arrangement of parts, as hereinafter fully described, illustrated in the accompanying drawings, and

Y pointed out in the claims hereto appended.

In the drawings, Figure 1 is a longitudinal sectional view of a wrench constructed in ac-' cordance with this invention. Fig. 2 is a transverse sectional view. Fig. 3 is an enlarged detail sectional view illustrating the manner of connecting the thumb-piece or head of the adj listing-screw to the body portion thereof. Fig. 4 is a longitudinal sectional view illustrating a modification of the invention.

Like numerals of reference designate corresponding parts in all the figures of the drawings.

1 designates a stationary jaw cooperating with a sliding jaw 2, which is mounted on a shank 3, having concave side faces 4 and pro- Vided with a rounded rear face 5. The shank is provided at its front edge with shouldered teeth 6, adapted to be engaged by a dog 7, which is housed within a casing or extension 8 of the movable jaw, and thelatter, which is provided withan opening for the passage of the shank 3, has the same enlarged toward its movement transversely of the shank, and the teeth 6 and 9 are retained in engagement with each other by means of a coiled spring 10, lo-

cated at the inner end of the movable jaw and interposed between the back of the same and the rear-face of the'shank'. The back of the sliding jaw is provided with a recess, forming a seat for the coiled spring 10, and by compressing the latter the dog may be readily disengaged from the shank, and the sliding jaw can then move freely on the latter to bring it adjacent to or carry it away from an object and to enable it to be quickly adjusted approximately to such object. The back portion of the sliding jaw is recessed between the ends, as shown at 11, to lighten the construction.

The sliding movement of the jaw 2 on the shank permits the jaws to be arranged close to the opposite sides of a nut or other object, and when the teeth 6 and 9 are engaged with each other the sliding jaw drops back slightly. The desired pressure 011 the object is eflfected by means o f a longitudinal adjusting-screw 12, having a threaded portion 13, engaging a 'correspondinglyethreaded opening or socket 14c of the jaw2. .tion 15,which passes through an opening 16 The screw hasa smooth porof the dog, and it is reduced to form a shoulder 17 for engaging the inner or front end of the dog, whereby the screw is adapted to bear against the dog and force the sliding jaw forwvard into engagement with the object to be clamped. The smooth portion 15 is further reduced at its center at- 18 to provide an intervening annular space between it and the dog to reduce the friction between the screw and the latter to a minimum. of the screw is reduced and threaded at 19, right-hand screw-threads being provided and a milled head or thumb-piece 20,.which is correspondingly threaded, is arranged on the reduced portion 19. In order to lock the head or thumb-piece on the adj usting-screw, a lefthand-threaded screw 21 isemployed and en- The outer on d for engaging the latter. By arranging the dog between the shoulder 17 and thesleeve a swivel connection between it and the screw is provided. The casing is provided with a transverse fastening device 24, consisting of a rivet or the like and passing through the space between the dog and thehead or thumbpiece 20. The movable jaw and the casing may be constructed of a single piece of metal, as illustrated in the accompanying drawings, ,or those parts can be made in separate pieces and suitably secured together, if desired.

In Fig. 4. of the accompanying drawings is illustrated 'a modification of the invention in which the adjusting-screw is swiveled to the sliding jaw and engages screw-threads of the dog, the screw-threads 26 of the adj usting-screw being located between the, ends thereof, as shown. The inner or rear end of the screw is. provided with ahead or thumb- .piece, as before described, and the forward or inner end of the screw is provided with a smooth bearing portion or head 27, arranged in a bearing-socket 2.8 and retained therein by a screw 29, mounted on the sliding-jaw, as shown, and engaging an annular recess cut in the screw adjacent to the head or bearing portion. 27. In order to reduce thefriction to a minimum, an antifriction-ball 30 is interposed between the end of the screw and the end. of the socket. 28. By rotating the adj usting-screw 25. the sliding jaw may be advanced independently-of the dog for thepurpose before explained.

The invention has the following advantages: The wrench is simple, inexpensive,

strong, and durable and is adapted to have its sliding jaw quickly moved along the shank to bring it adjacent to the nut or other Obi ject to be clamped, and the screw will permit the sliding jaw to be furtheradjusted to secure the necessary pressure. is housed within the casing of the movable jaw, and the parts are compactly. arranged and not liable to get out of order.

Changes in the form,.proportion, and minor details of construction, such as varying the arrangement of the adj usting-screw andomitting the ball shown. in the modification, may be resorted to without departing from the spiritor sacrificing any of the advantages of this invention.

What is claimed is '1- In awrench-,the combination of a tooth ed shank, a sliding jaw provided with athreaded The. spring 2. In a wrench,the combination of a toothed shank, a sliding jaw mounted thereon and capable of a limited movement laterally thereof,

shank, a sliding jaw mounted thereon, provided with a hollow extension or casing and ;having a limited movement transversely of the'shank, a dog housed within the casing 7 5 andengaging the shank, a screw connecting the dog and the jaw, said screw and dog being carried by the jaw in its transverse movement, and a spring for holding the dog nor mall-y in engagement with the shank, sub

stantially as described.

4. In a wrench, the combinationof a shank, a sliding jaw, a dog mounted on the sliding jaw and engaging the shank and provided with an opening, an adjusting-screw.having a threaded portion to engage the jaw, and provided with. a smooth portion passing through the opening of the dog, said screw havinga shoulder to engage the inner end of the latter, a sleeve arranged on the outer end of the a sliding jaw having a hollow casingand capableof a limited movement transversely of the shank, a dog housed within the casing and carried by the jaw in its transverse movement, a screwswiveled to the dog and engaging the jaw, anda fastening device passing I00 through thesides ot the casing and. located at the outer end of the dog, substantially as (lescribed.

.vided with a reduced portion having right- 6. A wrench having an adj tlStlDg-SGI'BW prohand screw-threads, said screw being also provided with a cylindrical socket having left-hand screw-threads, a head having a threaded opening and engaging the right hand screw-threads of the reduced portion of I to the screw and projecting laterally beyond the same, and a left-hand-threadedscrew arranged in said socket and having its head en- I gaging thesaid head and being of less diamscribed.

In testimony'thatI claim the foregoing as my own I have hereto aflixed my signature in the presence of two witnesses.

FREDERICK W. STEWART;

Witnesses:

CHARLES F. Hoyvn, LEONARD. F. IIUMPHREY.

- eter than the same, substantially as den5 

